Ambient Air quality Monitoring Guidlines. - Maharashtra Pollution ...

(c) Physical requirement of the monitoring site
Following physical aspects of the site must be met
The site should be available for a long period of time
Easy access to the site should be there anytime throughout the year.
Site sheltering and facilities such as electricity of sufficient rating, water , telephone
connection etc. should be available.
It should be vandal proof and protected from extreme weather
Highest concentrations and concentration gradients of carbon monoxide are likely to be in the
vicinity of roads, highways. The gradients vary in both time and space on the micro and on the
neighbourhood scale. The recommended criteria for siting monitoring stations for CO is given in
Table 4.3 (IS 5182 (Part 14) : 2000). These criteria is for reference only, actual criteria followed
at site must be based on compromise between available resources and site specific parameters
such as nearby sources, concentration gradients of pollutants etc.
Table 4.3: Recommended Criteria for Siting Monitoring Stations (Source: IS : 5182 (Part
14), 2000).
Station Type Description
Type A Downtown pedestrian exposure stations
Locate station in the central urban area in a congested, downtown
street surrounded by building where many pedestrian walk. Average
daily travel on the street should exceed 10000 vehicles with
average speed of less than 6.7 m/s. Monitoring probe is to be
located 0.5 m from the curb at a height of 3 ± 0.5 m
Type B Downtown neighborhood exposure station
Locate station in the central urban area but not close to any major
street. Specifically streets with average daily travel exceeding 500
vehicles should be located at atleast 100 m away from the
monitoring station. Typical locations are parks, malls or landscaped
areas having no traffic. Probe height is to be 3 ± 0.5 m above the
ground.
Type C Residential Station
Locate station in the midst of a residential area or sub-urban area.
Station should be more than 100 m away from any street having a
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